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Finding the Fourth Proportional to 396,758.88, 547,527.12 and 215,470.86

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Solution

The fourth proportional to 396,758.88, 547,527.12 and 215,470.86 is: 297,349.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,758.88 : 547,527.12 = 215,470.86 : x
  2. Step 2: Convert to fraction form
    396,758.88/547,527.12 = 215,470.86/x
  3. Step 3: Cross multiply
    396,758.88x = 547,527.12 × 215,470.86
  4. Step 4: Simplify right side
    396,758.88x = 117,976,136,558.48
  5. Step 5: Solve for x
    x = 117,976,136,558.48/396,758.88
  6. Step 6: Final answer
    x = 297,349.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.